Microsoft Azure Essentials Fundamentals of Azure Second Edition e-optimized 5x11 pdf



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9781509302963 Microsoft Azure Essentials Fundamentals of Azure 2nd ed pdf

Overview of cloud computing 
Cloud computing provides a modern alternative to the traditional on-premises datacenter. A public 
cloud vendor is completely responsible for hardware purchase and maintenance and provides a wide 
variety of platform services that you can use. You lease whatever hardware and software services you 
require on an as-needed basis, thereby converting what had been a capital expense for hardware 
purchase into an operational expense. It also allows you to lease access to hardware and software 
resources that would be too expensive to purchase. Although you are limited to the hardware 
provided by the cloud vendor, you only have to pay for it when you use it.  
Cloud environments provide an online portal experience, making it easy for users to manage 
compute, storage, network, and application resources. For example, in the Azure portal, a user can 
create a virtual machine (VM) configuration specifying the following: the VM size (with regard to CPU, 
RAM, and local disks), the operating system, any predeployed software, the network configuration, 
and the location of the VM. The user then can deploy the VM based on that configuration and within 
a few minutes access the deployed VM. This quick deployment compares favorably with the previous 
mechanism for deploying a physical machine, which could take weeks just for the procurement cycle. 
In addition to the public cloud just described, there are private and hybrid clouds. In a private cloud, 
you create a cloud environment in your own datacenter and provide self-service access to compute 
resources to users in your organization. This offers a simulation of a public cloud to your users, but 
you remain completely responsible for the purchase and maintenance of the hardware and software 
services you provide. A hybrid cloud integrates public and private clouds, allowing you to host 
workloads in the most appropriate location. For example, you could host a high-scale website in the 
public cloud and link it to a highly secure database hosted in your private cloud (or on-premises 
datacenter). 
Microsoft provides support for public, private, and hybrid clouds. Microsoft Azure, the focus of this 
book, is a public cloud. Microsoft Azure Stack is an add-on to Windows Server 2016 that allows you to 
deploy many core Azure services in your own datacenter and provides a self-service portal experience 
to your users. You can integrate these into a hybrid cloud through the use of a virtual private network.  

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